Jennifer Warren, NP
NPI 1215560461 · Nurse Practitioner · Stanford, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jennifer Warren, NP is a Nurse Practitioner provider in Stanford, CA (NPI 1215560461).
Provider details
- NPI number
- 1215560461
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- 95013759 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
6 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
55 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 30 | $196 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 13 | $123 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 12 | $75 |
Typical Medicare-allowed amounts for these services range $75–$196 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 2823 Fresno StFresno, CA 93721-1324Phone: (559) 459-3705
Registry dates
- Enumerated
- 2020-02-17
- Last updated
- 2021-06-09
- Certified
- 2021-06-09
Frequently asked questions
- What is Jennifer Warren's NPI number?
- Jennifer Warren's National Provider Identifier (NPI) is 1215560461, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jennifer Warren's specialty?
- Jennifer Warren is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Jennifer Warren located?
- Jennifer Warren's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Jennifer Warren's phone number?
- The practice phone number listed in the NPPES registry for Jennifer Warren is (650) 723-4000.
- Does Jennifer Warren accept Medicare?
- Jennifer Warren is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jennifer Warren's NPI active?
- Yes — Jennifer Warren's NPI (1215560461) is active in the NPPES registry as of the last update on 2021-06-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.